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Stockholders' Equity - Summary of Outstanding Stock Warrants (Details) - Warrants [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Number of Warrants Balance Beginning | 182,191 | 193,492
Number of Warrants Expired |  | (301)
Number of Warrants Exercised |  | (11,000)
Number of Warrants Balance Ending | 182,191 | 182,191
Number of Warrants Exercisable | 182,191 |
Weighted Average Exercise Price Balance Beginning | $ 25.04 | $ 23.96
Weighted Average Exercise Price Expired |  | 62.40
Weighted Average Exercise Price Exercised |  | 4.80
Weighted Average Exercise Price Balance Ending | 25.04 | $ 25.04
Weighted Average Exercise Price Exercisable | $ 25.04 |
Weighted Average Remaining Contractual Life (in years) Balance Beginning | 3 years 1 month 6 days | 4 years 1 month 6 days
Weighted Average Remaining Contractual Life (in years) Balance Ending | 2 years 9 months 18 days | 3 years 1 month 6 days
Weighted Average Remaining Contractual Life (in years) Exercisable | 2 years 9 months 18 days |

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- Definition Number of equity instruments non equity options exercisable, including both vested and non-vested instruments. + References No definition available. + Details
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- Definition Weighted Average Exercise Price, exercisable. + References No definition available. + Details
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- Definition Weighted Average Exercise Price, exercised. + References No definition available. + Details
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- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of shares under non-option equity instrument agreements for which rights to exercise lapsed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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